.. SPDX-License-Identifier: GPL-3.0-or-later
.. Copyright © 2019 Ariadne Devos

s²'s license and copyright
===========================

(Before jumping to conclusions about legal stuff, read the *whole* section
first.)

s², including documentation, is licensed under the GNU General Public License
(GPL), version 3 or later (at your choice). Because that is a free software
license, it allows you study and run the code, make changes to your own version
and distribute the updated code the others. This avoids legal vendor lock-in.

There is one and only one exception to the s² is GPL-licensed rule:
the GPL is embedded in the source code and documentation, as a work on itself,
an appendix and attachment and is therefore not consider to be part of s²
proper. It comes with its own license that doesn't allow modification, although
verbatim copying and distribution is allowed.

Keeping track
-------------

Which licenses apply is always indicated in the source code, with a comment
of form `SPDX-License-Identifier: LICENSE OR OTHER-LICENSE`. The GPL,
version 3 or later (at your choice) is abbreviated to `GPL-3.0-or-later`.
Some parts may be dual-licensed under another license.

To whom the copyright belongs is also always indicated, with a comment
of form `Copyright (C) years author` or `Copyright © years author`.
(A conversative stance on eligibility is taken: when in doubt, include
the notice, and always be in doubt.)

These two notices are required from contributors to the upstream project.
As a fork, you can set your own conventions.

License notice
--------------

(This applies to both documentation and code.)

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
